Patent US5010133A successfully refreshed from Google Patents.
US5010133A
Expired / Lapsed
US
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Polyurethane molding composition, method and article
Assignee: Cabot Corp
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Filing: 1989-09-29
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Granted: 1991-04-23
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Expires: 2009-09-29
Abstract
Abstract A high pressure method of molding polyurethane articles is described. A polyurethane material is formed from a cross-linkable polymer comprising the reaction product of a polyol and polyisocyanate, said polymer containing a high activation temperature catalyst and a high surface area filler. The material is processed to a gum state suitable for high pressure molding. The material and process are particularly suitable for forming small, intricately shaped articles. Such articles are also described.
Inventors
- 👤 Alan R. Seville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:51
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/16; C08G18/22; C08G18/222; C08G18/28; C08G18/65; C08G18/66; C08K; C08K3/00; C08K3/34; C08K3/36; C08G2350/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
48 words
A polyurethane gum material produced by partially reacting a cross-linkable mixture of polyol, polyisocyanate, high activation temperature catalyst and a high surface area filler, the gum material being stable at low temperatures, hand-workable at room temperatures, and capable of being liquified and high pressure molded at elevated temperatures.
Claim 2
Dependent Claim
48 words
A polyurethane gum material produced by partially reacting a cross-linkable mixture of polyol, polyisocyanate, high activation temperature catalyst and a high surface area filler, the gum material being stable at low temperatures, hand-workable at room temperatures, and capable of being liquified and high pressure molded at elevated temperatures.
Claim 3
Dependent Claim
51 words
A process of producing a polyurethane gum material by partially reacting a cross-linkable mixture of polyol, polyisocyanate, high activation temperature catalyst and a high surface area filler, the gum material being stable at low temperatures, hand-workable at room temperatures, and capable of being liquified and high pressure molded at elevated temperatures.
Claim 4
Dependent Claim
51 words
A process of producing a polyurethane gum material by partially reacting a cross-linkable mixture of polyol, polyisocyanate, high activation temperature catalyst and a high surface area filler, the gum material being stable at low temperatures, hand-workable at room temperatures, and capable of being liquified and high pressure molded at elevated temperatures.
Claim 5
Dependent Claim
60 words
A cross-linked, energy absorbing polyurethane article produced from a cross-linkable polymer comprising the reaction product of a polyol and polyisocyanate, said polymer containing a high activation temperature catalyst and a high surface area filler, said article having a 10 Hertz material loss factor equal to or greater than about 1.0 at temperatures between -10 degrees C. and 30 degrees C.
Claim 6
Dependent Claim
60 words
A cross-linked, energy absorbing polyurethane article produced from a cross-linkable polymer comprising the reaction product of a polyol and polyisocyanate, said polymer containing a high activation temperature catalyst and a high surface area filler, said article having a 10 Hertz material loss factor equal to or greater than about 1.0 at temperatures between -10 degrees C. and 30 degrees C.
Claim 7
Independent Claim
54 words
A method of molding comprising heating a polyurethane gum material comprising a partially reacted cross-linkable mixture of polyol, polyisocyanate, high activation temperature catalyst and a high surface area filler to a viscous state, high pressure molding an article from the heated gum material, and curing the polyurethane gum material to form the molded article.
Claim 8
Independent Claim
54 words
A method of molding comprising heating a polyurethane gum material comprising a partially reacted cross-linkable mixture of polyol, polyisocyanate, high activation temperature catalyst and a high surface area filler to a viscous state, high pressure molding an article from the heated gum material, and curing the polyurethane gum material to form the molded article.
Claim 9
Dependent Claim
15 words
The invention of claim 3 or 4, wherein the article weighs up to 20 grams.
Claim 10
Dependent Claim
15 words
The article of claim 3 or 4, wherein the invention weighs up to 5 grams.
Claim 11
Dependent Claim
30 words
The process of claim 2 wherein a viscometer is employed to monitor the cure of the polymer mixture to produce the polyuretane gum material capable of being high pressure molded.
Claim 12
Dependent Claim
15 words
The invention of claim 1, 2 or 3 wherein the polyol is a polyester polyol.
Claim 13
Dependent Claim
14 words
The invention of claim 1, 2 or 3 wherein the filler is fumed silica.
Claim 14
Dependent Claim
17 words
The invention of claim 1, 2, or 3 wherein the high activation temperature catalyst is zinc stearate.
Claim 15
Dependent Claim
14 words
The invention of claim 1, 2, or 3 wherein the filler is fumed silica.
Claim 16
Dependent Claim
16 words
The invention of claim 3 or 4 wherein the article is a small, intricately shaped article.
Claim 17
Dependent Claim
25 words
The invention of claim 3 or 4 wherein the article is a vibration isolator or shock mount, especially adapted for use in a precision instrument.
Claim 18
Dependent Claim
34 words
The invention of claim 3 or 4 wherein the artilce exhibits a combination of properties including vibration damping, mechanical strength, environmental resistance and stability over a temperature range of -40 to 150 degrees C.
References Cited (Backward Citations)
US3062772A
Cited
US3061574A
Cited
US3395108A
Cited
US3483150A
Cited
US3980606A
Cited
US4349640A
Cited
US4551498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |